/*
 * Copyright 2010-2020 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.engine.impl.bpmn.behavior;

import org.activiti.bpmn.model.FlowNode;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.impl.delegate.TriggerableActivityBehavior;
import org.activiti.engine.impl.persistence.entity.ExecutionEntity;

/**
 * Superclass for all 'connectable' BPMN 2.0 process elements: tasks, gateways
 * and events. This means that any subclass can be the source or target of a
 * sequenceflow.
 *
 * Corresponds with the notion of the 'flownode' in BPMN 2.0.
 *
 */
public abstract class FlowNodeActivityBehavior implements TriggerableActivityBehavior {

	private static final long serialVersionUID = 1L;

	protected BpmnActivityBehavior bpmnActivityBehavior = new BpmnActivityBehavior();

	/**
	 * Default behaviour: just leave the activity with no extra functionality.
	 */
	public void execute(DelegateExecution execution) {
		leave(execution);
	}

	/**
	 * Default way of leaving a BPMN 2.0 activity: evaluate the conditions on
	 * the outgoing sequence flow and take those that evaluate to true.
	 */
	public void leave(DelegateExecution execution) {
		bpmnActivityBehavior.performDefaultOutgoingBehavior((ExecutionEntity) execution);
	}

	public void leaveIgnoreConditions(DelegateExecution execution) {
		bpmnActivityBehavior.performIgnoreConditionsOutgoingBehavior((ExecutionEntity) execution);
	}

	public void trigger(DelegateExecution execution, String signalName, Object signalData) {
		// concrete activity behaviours that do accept signals should override this method;
		throw new ActivitiException("this activity isn't waiting for a trigger");
	}

	protected String parseActivityType(FlowNode flowNode) {
		String elementType = flowNode.getClass().getSimpleName();
		elementType = elementType.substring(0, 1).toLowerCase() + elementType.substring(1);
		return elementType;
	}

}
